Saw



EJE-@@9638 sept. 25; 1923.

. H. E. KIMMEL SAW Filed Jan. 9. 1922 afm Patented Sept. 25, 1923.

Y HARRY B. Klimaat, or HreH'Lairn PARK, MICHIGAN.

SAW'.

` Y Application filed January 9,'1922. Serial No. 527,975.

` To all whom it may concern:

new and useful Improvements in Saws, ot

which the following is a specification.

This invention relates to hack or similar saws,and has for its object a hack saw arranged to work against a plane or a fiat surlace. For instance, in removing a bolt head from' a boiler 0r a nut from a plane, fiat surface, it is usually necessary to employ a cold chisel because the ordinary hack saw cannot work down to the flat surface on account of the handle andthe frame being in the way. Tt is the object of the present invention to overcome this difficulty by providing a special form of blade-tensioning members. In my previous application No. 507,181, I have described and claimed a strut constructionftor bowing out the saw blade for this purpose. The Vpresent invention is cheaper to manufacture andrdoes not require any special'equipment on the yoke frame to achieve the bowing out of the blade.

ln the .drawingsf- Fig. l is a side elevation of the saw equipped with my improvedblade-tensioning members.

Fig. 2 is a perspective of `one of these;

Fig. 3 is a perspective of the other of these.

Fig. 4 is a detail of one of the slides that bears the handle.

a' designates `the yoke frame. This is arranged to take a pair of blade-tensioning members o and c. These blade-tensioning members are bowed or formed into elbows in which the two runs of the elbow .are at an obtuse angle. Both ofthe blade-tensioning members Z) are in the form oit' slidesV pro-V vided with-threaded portions on which are wing nuts. These Velbow-like blade-tensioning members also have their inner ends Y curved in toward each other as shown in Fig.

Vtensioning members.

i over the elbow-like blade-tensioning members.

Preferably the handle is also carried on an elbow or bowed spindle that angles away from the ends of the yoke frame, as is shown in F ig. 1. This elbow is provided with a threaded socket or errule g which may be turned onto the end of the blade-tensioning member c and the pin 71, then driven in. This holds the elbow and the handle from turning on the threads; Vith the handle thus remote Jtrom the end of the yoke arms, it will be obvious that this tool may be very easily used against flat surfaces while the handle will be completely removed from the .surface by reason not only of the blade being carried upon the elbow-like or bowed blade-tensioning members but also by reason of lthe handle angling away from the blade due to the elbow-like handle spindle.

The back of the yoke is made in two pieces provided with slots and lugs 2O which interlock. lVhen the back breaks on the pivot 2l, the two parts may be slid along to lengthen the yoke and may then be engaged again. This permits the blade-tensioning members to be drawn away from each other. The pegs 22 can then be used to hold the ends of the saw blade and this will permit the hack saw to function in its normal way. It desired, the handle may be turned through onehalt a turn to bring it down when it substantally aligns with the blade.

VlVhat T claim is:

l. A hack saw having in combination a handle, a yoke like trame connecting with the handle and longitudinally extensible and contractable, a pair ot members having elbow portions secured to the ends of the yoke and adapted to bow out the intermediate portion of the blade beyond the ends of the yoke so that the handle and yoke ends will clear a surface contacted by the side of the blade, and means 'on the ends of said members tor holdingthe blade in substantially the plane of the yoke when the trame has been adjusted to 'an extended position.

Qv A -4 V1,468,6384

handle to permit the saw blade to contacl an angularly bent spindle and eoVn'nee-'ced a surface which is cleared by the handle. wthfone of the tension ,ibolts whereby i the 10V 3. A hack saw, comprising a yoke-like blade may Contact with aV su'favce ,and'WheIeframe, a pair of angula-rly bent tensioning by the handle is removedzfljom such Ysurface i5 bolts and nuts supported by the ends of the and thereby keeps vthe .handfgras'pngzirihe Y yoke arms, a saw blade tensioned over'V said handle elearrl of said snfaoe. 1

tensioning bolts and bowed out beyond the y In testimony whereof I'ax my s-igz'natre. Y

ends of the yoke frame, andv a handle having Y v HARRY KIBMEL. Y 

